Brush.



No. 678,43l. Patented .Iuly I6, I90}.

w. H. BAIBD.

BRUSH.

(Application filed Aug. 14. 1990.)

(No Model.)

mm D %.70.

UNITED STATES PATENT OFFICE.

WILLIAM HARAH BAIRD, OF BURLINGTON, IOWA.

BRUSH.

srnoirrcnrron forming part of Letters Patent No. 678,431, dated July 16,1901. Application filed August 14, 1900. Serial No. 26,857. (No model.)

brush particularly designed for dental purposes, formed in a manner tofit the dental arch and constructed of material which willrender thebrush antiseptic and will permit its use in hot or cold water withoutdanger of deterioration.

A further object of the invention is to construct a brush which will notwarp under various conditions of use and the manufacture of which willbe facilitated by the employment of a separate bristle-plate in whichthe bristles are mounted before the plate is placed in the brush.

Further objects of the invention will hereinafter more fully appear asthe necessity for their accomplishment is developed in the succeedingdescription, reference being had to the accompanying drawings for thepurpose of more clearly defining the'construction and arrangement of thedental brush and of other forms of brushes which are capable of beingproduced Without departing from the spirit of the invention.

In the drawings, Figure 1 is a perspective view of a tooth-brushconstructed in accordance with my invention. Fig. 2 is a transversesectional view on the line 2 2 of Fig. 1. Fig. 3 is a perspective viewof the brush frame detached. Fig. 4 is a perspective view of thetooth-brush looking from the under side and with a number of thebristles removed. Fig. 5 is a view similar to Fig. 1 of a modified formof the invention. Fig. 6 is a perspective View, partly'broken away, of ahair-brush constructed in accordance with the invention. Fig. 7 is aperspective view of a clothes-brush. Fig. 8 is a detail perspective viewof the wire bead. Fig. 9 is a detail view of the bristle-plate, and Fig.10 is a similar view of the backing-plate.

Referring to the numerals of reference employed to designatecorresponding parts in tles 9.

the several views, 1 indicates the frame of a tooth-brush stamped from ablank of sheet metal, preferably aluminium, and bent to form ahollowhandle 2 and a longitudinallycurved brush-loop 3, having its lower edge4 turned in and disposed substantially at right angles to the side walls5 of the loop. In the course of manufacture this brush-frame is formedby first cutting out a suitable blank and next stamping an elongatedopening therein, said opening defining the inner edge of the inturnedflange 4-. of the loop. The handle portion of the blank is then foldedover, and the edges are brought together and are soldered along a linedisposed at the back of the handle 2. The side walls 5 of the loop arethen turned up, as shown in Fig. 3, and the frame is ready for thereception of the several other elements of thebrush structure. From thesheet metal is next out what may be termed the bristle plate 7,conforming substantially to the contour of the head of the brushthat isto say, tothe interior dimensions of the side walls 5 thereof-and ispunched to form a number of perforations or bristlesockets 8 for thereception of the tufts of bris- These bristles are inserted in thebristle-plate before the latter is incorporated in the brush structureand are retained against detachment from said plate by means of aninsoluble bristle-retaining cement 10, which after the tufts of bristlesare passed through the plate is spread over the upper surface or back ofthe plate to form a binder for the bristles. The bristle-plate 7, withits complement of bristles,is now placed in the brushframe, with itsedges resting upon the platesupporting flange 4, and is retained inplace by a filler 11 of insoluble cement and asbestos combined, whichfiller is spread over the cementbinder of the bristle-plate until thedesired thickness or body has been obtained. After the filler has beenproperly applied it is covered by a backing-plate 12, Wl1l0l1 fitssnugly within the side wall 5 of the head-loop and has a comparativelynarrow extended end 13, whichprojects into the adjacent extrem ity ofthe handle. The backing-plate is then pressed firmly in place in orderto compress the filling 11 and to form a solid backing for the bristles.Next a wire stiffening-bead 14 is placed upon the backing-plate, withits ends 15 extended into the handle, and the brush is finally completedby rolling the upper edge of the side wall 5 to form a hollow bead forthe reception of the head-loop over the wire bead 14, as best seen inFig. 6 of the drawings. The edges of the metal are then rubbed down, andthe exposed metal surfaces are polished in the manner well understood inthe art.

In Fig. 6 I have illustrated a modification of the invention whichmerely comprehends the construction of a hair-brush instead of atoothbrush, the only diiference between this article and the tooth-brushresiding in the dimensions and general design. In Fig. 7 I have shown aclothes-brush constructed in accordance with the invention, and in Fig.5 I have shown a slight modification of the construction shown in thefirst three figures, inasmuch as I have endeavored to illustrate themanner in which the backingplate 12 might, if desired, be extended fromend to end of the brush in order to constitute a backing for both thehead and handle thereof.

From the foregoing it will be seen that I have produced an inexpensive,practically indestructible, and exceedingly light brush, the parts ofwhich are secured in a manner to preclude the possiblity of theirseparation when subjected to the action of heatas, for instance, byimmersion in boiling water; but while the present embodiment of myinvention appears at this timeto be preferable I do not wish to beunderstood as limiting myself to the constructions illustrated anddescribed, since it is obvious that many variations of design andgeneral arrangement might be effected without departing from the spiritof the invention. I therefore reserve the right to eifect such changes,modifications, and variations as may be properly comprehended within thescope of the protection prayed.

That I claim is- 1. A brush comprehending a frame-loop having inturnedflanges, a bristle-plate carrying bristles and having its edgessupported by an inturned flange, the edges of said f rameloop above thebristle-plate being inturned, a backing plate and a wire bead retainedagainst the backing-plate by one of said inturned flanges.

2. A brush comprising a frame-loop having an inturned flange, a bristleplate resting upon said flange, a backing-plate disposed behind thebristle-plate,the upper edge of the frame-loop being rolled to form ahollow bead opposed to the backing-plate.

3. A brush comprising a frame-loop having its edges inturned, abristle-plate and a backing-plate retained by said inturned edges of theframe-loop, and a filler of insoluble cement and asbestos between saidplates.

4. A brush comprising a frame-loop having its opposite edges inturned, abristle-plate, a backing-plate and an intermediate insoluble andnon-conductive plastic filler all retained between the inturned edges ofthe frame-loop, and a wire bead located behind the backingplate andretained within the opposed inturned edge of the frame-loop. 5. A brush'comprising a frame loop and handle, theopposite edges of said frame-loopbeing inturned, a bristle-plate and a backingplate disposed between theinturned edges of the frame-loop, said backing-plate being extended intothe handle, a filler between't'h'e bristle-plate and backing-plate, anda wire bead located within the inturned edge of the frame-loop which isopposed to the backingplate.

6. A brush comprisingahandle and a frameloop, the edges of which latterare inturned, a bristle-plate and a backing-plate having their edgesclamped between the inturned edges of the frame-loop, a wire beadretained by one of the inturned edges of the loop, said head andbacking-plate being extended into the handle.

7. A brush comprising a frame struck from a single sheet of metal andcomprising a hollow'handle and a frame-loop having its edges inturned, abristle-plate and a backing-plate clamped between the inturned edges ofthe frame-loop, said backing-plate being extendedinto the hollow handle,a wire bead inclosed by one of the inturned edges of the frame-loop andlikewise extended into the handle, a plastic filler intermediate of thebristle-plate and backing-plate, bristles retained in the bristle-plate,and a coating of cement connecting and binding the bristles at the backside of the bristle-plate.

In testimony that I claim the foregoing as myown I have hereto afiixedmy signature in the presence of two witnesses.

WILLIAM lIARAlI BAIRD.

Witnesses:

DAN GOULD, C. G. SKINNER.

